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Doug U.
Samba Member
Joined: November 22, 2018
Posts: 11
Location: Kansas
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 Posted: Tue Jan 08, 2019 8:00 am Post subject: 18mm to 14mm, Spark Plug Adapter |
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Since it is so difficult to get a 13/16 socket through the tin to change plugs, I was considering getting adapters and going to an equivalent 5/8 socket (14mm) spark plug.
Has anyone tried this and does it work?
Thank you,
Doug
https://brillman.com/product/spark-plug-adaptor-18mm-to-14mm/ |
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Emeraldlion
Samba Member
Joined: April 13, 2005
Posts: 743
Location: Texarkana, TX
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| Posted: Tue Jan 08, 2019 8:16 am Post subject: Re: 18mm to 14mm, Spark Plug Adapter |
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| Which engine/tin? Just did plugs on my stock 1500sp and didn't have any problem with the 13/16 socket. |
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FeelthySanchez
Samba Member
Joined: February 03, 2011
Posts: 1349
Location: Now is that a real poncho, or a Sears poncho?
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| Posted: Tue Jan 08, 2019 8:21 am Post subject: Re: 18mm to 14mm, Spark Plug Adapter |
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5/8" is closer to 16mm ......
Not a great idea: perhaps try a plug w/ reduced (5/8") hex drive.
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vwracerdave
Samba Member
Joined: November 11, 2004
Posts: 15308
Location: Deep in the 405
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| Posted: Tue Jan 08, 2019 10:45 am Post subject: Re: 18mm to 14mm, Spark Plug Adapter |
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You can get 14mm NGK plugs with a 5/8" head. NO adaptors are needed.
What plug are you currently using?
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Cusser
Samba Member
Joined: October 02, 2006
Posts: 31378
Location: Hot Arizona
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| Posted: Tue Jan 08, 2019 12:25 pm Post subject: Re: 18mm to 14mm, Spark Plug Adapter |
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| Doug U. wrote: |
Since it is so difficult to get a 13/16 socket through the tin to change plugs
Doug |
Doug - that would be my FOURTH option. In no particular order for options #1 to #3:
#1 would be to grind down the existing spark plug socket on a bench grinder for easier fit (wear safety goggles). I did just that about 40 years ago to my socket, to get to my plugs on my ingle Weber manifold on my 1835cc DP engine, still use that socket.
#2 would be to buy a thin wall spark plug socket
#3 would be to use a spark plug like VWRacerDave details below:
| vwracerdave wrote: |
You can get 14mm NGK plugs with a 5/8" head. NO adaptors are needed.
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#4 might be https://brillman.com/product/spark-plug-adaptor-18mm-to-14mm/
By the way: single port or dual port engine? Factory or aftermarket tins and manifold/end castings?
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1970 VW (owned since 1972) and 1971 VW Convertible (owned since 1976), second owner of each. The '71 now has the 1835 engine, swapped from the '70. Second owner of each. 1988 Mazda B2200 truck, 1998 Frontier, 2014 Yukon, 2004 Frontier King Cab. All manual transmission except for the Yukon. http://www.thesamba.com/vw/forum/album_page.php?pic_id=335294 http://www.thesamba.com/vw/forum/album_page.php?pic_id=335297 |
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Lingwendil
Samba Member
Joined: February 25, 2009
Posts: 3988
Location: Antioch, California, a block from the hood
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| Posted: Wed Jan 16, 2019 11:58 am Post subject: Re: 18mm to 14mm, Spark Plug Adapter |
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| vwracerdave wrote: |
You can get 14mm NGK plugs with a 5/8" head. NO adaptors are needed.
What plug are you currently using? |
Hey there, for those of us that aren't terribly up on these things, is there a handy chart or some similar guide to cross referencing plugs that would help determine a good stock replacement with a reduced drive size? Something like a BP5HS or BP6HS with a 5/8 hex would be lovely 
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modok
Samba Member
Joined: October 30, 2009
Posts: 26788
Location: Colorado Springs
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| Posted: Wed Jan 16, 2019 11:30 pm Post subject: Re: 18mm to 14mm, Spark Plug Adapter |
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With a socket like this it's easy, works on a lot of other things too.
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timvw7476
Samba Member
Joined: June 03, 2013
Posts: 2205
Location: seattle
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| Posted: Thu Jan 17, 2019 12:25 pm Post subject: Re: 18mm to 14mm, Spark Plug Adapter |
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| modok wrote: |
With a socket like this it's easy, works on a lot of other things too.
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Modok, what application is that double 3/8th" drive jobbie in the middle for?
I like it & want to know how to use it when I build it. 
EDIT: or is it 1/2" double drive? Nevertheless. |
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Cusser
Samba Member
Joined: October 02, 2006
Posts: 31378
Location: Hot Arizona
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Cusser
Samba Member
Joined: October 02, 2006
Posts: 31378
Location: Hot Arizona
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| Posted: Fri Jan 18, 2019 12:41 pm Post subject: Re: 18mm to 14mm, Spark Plug Adapter |
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| vwracerdave wrote: |
| You can get 14mm NGK plugs with a 5/8" head. NO adaptors are needed. |
Got that NGK part number for normal thread depth and heat range for VWs???
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1970 VW (owned since 1972) and 1971 VW Convertible (owned since 1976), second owner of each. The '71 now has the 1835 engine, swapped from the '70. Second owner of each. 1988 Mazda B2200 truck, 1998 Frontier, 2014 Yukon, 2004 Frontier King Cab. All manual transmission except for the Yukon. http://www.thesamba.com/vw/forum/album_page.php?pic_id=335294 http://www.thesamba.com/vw/forum/album_page.php?pic_id=335297 |
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